Our 2016 Travel Photo Contest is in full swing. Here are some of the best photos (so far).

For the 17th year, Travel asks readers for their best travel photos. This sampling shows the contest has some stiff competition.

Falling rainbow“A permanent rainbow hovers over Niagara Falls and every few minutes a boat takes tourists just to the bottom of the falls as they come crashing down,” wrote Joshua Kaufman, 65, of Chevy Chase, Md., in his submission taken in Canada. “Here it all comes together.” Joshua Kaufman